When a deadly house fire claims the life of a family in rural Oklahoma, investigators suspect foul play and a mother goes on a decadeslong crusade to find out what happened to her missing teenage daughter and best friend.

In June 1985, a 20-year-old Sucker Day Festival Queen is found brutalized; the small community of Nixa, Mo., is certain her blood is on the hands of a local wealthy businessman, but after 25 years DNA reveals the true killer.

When human bones are discovered in the woods in December 1985, it puts an end to the search for missing teen David Reed; skull fractures point to murder, but it will be decades before investigators can find David's killer.

When the body of 81-year-old Helen Gale is found in her burned-out car, investigators in Southfield, Mich., wonder who would murder this pillar of the community; it will be eight years before a blown alibi brings them face-to face with her killer.

When 30-year-old mother Lisa Gaudenzi fails to report for duty in Virginia, the Army lists her as AWOL; her family immediately suspects foul play, so they embark on a 13-year quest for answers before an eyewitness blows the case wide open.

In 1980, radio intern Helene Pruszynski is found brutalized in a snowy field; after 37 years of fruitless leads, investigators tap into a public genealogy website that leads them across the country to the killer they've been hunting.

In 1979, Janie Landers disappears from a home for the impaired; when Janie's body is found, there are many suspects but it is years before the killer and the atrocities in the facility are revealed.

In 1984, Jack Kennedy discovers his daughters brutally murdered; their mother and niece spend their lives keeping the case alive; thirty years later, an informant gives up a name, but the family's ordeal is far from over.

When 30-year-old mother Lisa Gaudenzi fails to report for duty in Virginia, the Army lists her as AWOL; her family immediately suspects foul play, so they embark on a 13-year quest for answers before an eyewitness blows the case wide open.

In 1980, radio intern Helene Pruszynski is found brutalized in a snowy field; after 37 years of fruitless leads, investigators tap into a public genealogy website that leads them across the country to the killer they've been hunting.

In 1979, Janie Landers disappears from a home for the impaired; when Janie's body is found, there are many suspects but it is years before the killer and the atrocities in the facility are revealed.

In 1984, Jack Kennedy discovers his daughters brutally murdered; their mother and niece spend their lives keeping the case alive; thirty years later, an informant gives up a name, but the family's ordeal is far from over.

When human bones are discovered in the woods in December 1985, it puts an end to the search for missing teen David Reed; skull fractures point to murder, but it will be decades before investigators can find David's killer.

When the body of 81-year-old Helen Gale is found in her burned-out car, investigators in Southfield, Mich., wonder who would murder this pillar of the community; it will be eight years before a blown alibi brings them face-to face with her killer.

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A soldier tries to kill another soldier; a hunter in the mountains; killer still in the house.

A woman is abducted by another woman who tries to steal her unborn baby; a geologist is attacked by a bear; a woman is shot and held hostage.

A young woman and her friend are shot execution style; two strangers are caught in a deadly train collision; a young girl escapes her abductors only to be assaulted my another man.

A man is taken hostage by Marxist rebels; two girls are abducted while walking home from school.

Nia Wilson and her two sisters decide to take public transportation back home to Oakland, Calif.; the sisters are targeted at a train station; the knife attack sparks a search for the perpetrator.

Kelsey's family knew something was amiss when their usually responsible and responsive daughter didn't respond to their texts while out running an errand.

The family of Miya Marcano share the agonizing details of what happened around the beautiful, 19-year old's disappearance.

After 26-year-old rideshare driver Carolina Vargas drives a nice stranger to his hotel, she has no qualms about giving him another ride; her trusting gesture turns tragic and Carolina is forced to fight for her life.

When Becky Koster returns home from a night out, she texts her mother, Barbara, that she made it back safely; however, when Barbara arrived home hours later, Becky was nowhere to be found; Barbara recalls the gut-wrenching search for her daughter.

Hannah Anderson's best friend knew something was wrong when Hannah stopped responding to her texts; no one knew that Hannah had been abducted by someone close to her; the amber alert system was used for the first time.

A dark secret unravels the friendship between an organic farmer and a lumber mill worker, leading to a killing spree and a manhunt.

Two Pennsylvania girls grow up as best friends, but things get rocky when they become lovers and a third girl befriends them.

Three friends turn to small-time criminal activity to survive; as the crimes get bigger, so do the stakes.

When one best friend falls for the other man's wife, all bets are off.

What starts out as an unlikely friendship becomes a deep bond, until a tragic event leads to suspicion and revenge; two people are dead and one is on the way to Death Row.

Two best friends turn on each other when a third girl transforms their solid duo into an unstable trio.

Three friends turn to small-time criminal activity to survive; as the crimes get bigger, so do the stakes.

When one best friend falls for the other man's wife, all bets are off.

What starts out as an unlikely friendship becomes a deep bond, until a tragic event leads to suspicion and revenge; two people are dead and one is on the way to Death Row.

Two best friends turn on each other when a third girl transforms their solid duo into an unstable trio.

A dark secret unravels the friendship between an organic farmer and a lumber mill worker, leading to a killing spree and a manhunt.

Two Pennsylvania girls grow up as best friends, but things get rocky when they become lovers and a third girl befriends them.

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A mother is jammed into a snow-filled garbage can by her ex-husband; a woman struggles to escape a pile of bodies after an elevator malfunction; three men attack a bar owner as part of a gang initiation.

Two women fight for their lives when an attacker ambushes them on a mountain trail; two men survive 14 hours adrift at sea.

A man is attacked by a grizzly bear in a remote forest area; a woman engages in a gun battle with three masked men who invade her home; a woman is assaulted by a man posing as a maintenance worker.

A store manager and his staff are shot by two killers; a young man has both his arms torn off in an accident; a young girl is kidnapped by a serial killer.

Emergency medical responders on the New Orleans night shift race to save victims of a drive-by shooting and a serious car accident, all against the backdrop of the continuing pandemic.

Mardi Gras proves hectic for the responders; a man impales his hand on a fence, while another is stabbed in the face; the search for armed robbers leads to a high-speed chase.

Strange events are afoot across New Orleans, as the first responders must treat a stabbing and a dog bite on Bourbon Street, a pregnant woman in distress, and an overturned vehicle that could go from bad to worse.

EMS responders face an unpredictable night of crises, including a violent facial attack, a high school football injury, and a heroin addict's emotional vow.

The unexpected reigns in the city of New Orleans as EMS responders answer calls about a child shooting, a multiple-vehicle car accident, a reported suicide attempt, and a veteran struggling with a drug overdose.

The legendary French Quarter takes center stage for a busy night of EMT action, as the technicians treat multiple unconscious patients, a young woman assaulted at a party, and a car accident featuring a victim with a tragic backstory.

The New Orleans EMT team treats a motorcycle accident victim in danger of losing a limb, multiple seizure sufferers, a young child with a breathing obstruction, and a perpetrator whose condition makes him a danger to himself and others.

EMS first responders keep their cool and maintain their spirits as they face a series of challenges across New Orleans, including a shooting and stabbing victim and a woman whose slot machine experience takes a bizarre turn.

Officers Roni and Cooper engage in a foot chase following a stabbing at a nightclub; Fire Rescue's Doug and Stokes try to save the life of a man shot in the throat; the hunt for a carjacker leads Will and Dimitri to the roof of an apartment complex.

Police officer Justin joins the SWAT team in a raid; the first responders treat an accident victim with amnesia and a woman who fell off a roof; Arkady bonds with a man who attempted suicide.

The New Orleans EMTs receive calls from every direction, from gunshot victims to seizures to a moped rider playing Pokemon Go.

Police shoot a man; Tony and Dave treat a stabbing victim; Stokes and Mayville work to extinguish a grocery store fire.

Officers Roni and Cooper engage in a foot chase following a stabbing at a nightclub; Fire Rescue's Doug and Stokes try to save the life of a man shot in the throat; the hunt for a carjacker leads Will and Dimitri to the roof of an apartment complex.

Police officer Justin joins the SWAT team in a raid; the first responders treat an accident victim with amnesia and a woman who fell off a roof; Arkady bonds with a man who attempted suicide.

The New Orleans EMTs receive calls from every direction, from gunshot victims to seizures to a moped rider playing Pokemon Go.

Police shoot a man; Tony and Dave treat a stabbing victim; Stokes and Mayville work to extinguish a grocery store fire.

The New Orleans EMT team treats a motorcycle accident victim in danger of losing a limb, multiple seizure sufferers, a young child with a breathing obstruction, and a perpetrator whose condition makes him a danger to himself and others.

EMS first responders keep their cool and maintain their spirits as they face a series of challenges across New Orleans, including a shooting and stabbing victim and a woman whose slot machine experience takes a bizarre turn.

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Amber and Michelle Yates discuss being raised by a man who terrorized the city of Spokane, Wash.; in an effort to find healing, the Yates sisters meet with the sister of one of their father's victims.

Drew Peterson's eldest son Stephen shares memories about his father; Stephen reaches out to his former step-mother's sister to offer his condolences for his father's heinous actions.

Melissa Moore, daughter of Keith Hunter Jesperson, tells her story as the daughter of a serial killer; Melissa meets a family member of one of her father's victims.

Richard Ramirez's ex-sister-in-law and niece come to terms with the evil that existed in their family and meet a survivor of one of Richard's attacks.

On June 12, 2016, Omar Mateen kills 49 people in an Orlando nightclub; Omar's first wife, Sitora Yusufiy, meets a man whose brother was killed in the nightclub attack.

Randy Hausner reveals how his brother terrorized the city of Phoenix in a killing spree; Randy meets with a shooting survivor and with the son of a man killed by his brother.

Mildred Muhammad, ex-wife of the infamous DC Sniper, reveals how the man she loved disintegrated into a monster; Melissa Moore interviews Lee Boyd Malvo in prison.

Richard Beasley's daughter Tonya lives with the guilt of teaching her father how to post ads on Craigslist; Tonya meets a man whose father was one of Beasley's four victims.

A woman discusses how her childhood sweetheart turned into a murdering rapist; being a child of a serial killer.

John Wayne Gacy's sister reveals intimate details of the killer, and returns to her childhood home in Chicago with her daughter.

Jennifer Asbenson recounts her fight to stay alive and escape the clutches of 32-year-old Andrew Urdiales, her would-be killer who kidnapped her in September 1992 when she 17.

In August of 1978, 14-year-old Lisa Gilbert and her 13-year-old brother, Randy, were attacked by a stranger in their newly built home in Lansing, Mich.

In April of 2016, 16-year-old Madison Nygard walks home from a party in rural Muskegon County, Mich., and takes a ride with a passing stranger.

Josephina Rivera's life comes to a halt when the 25-year-old is kidnapped by 43-year-old Gary Heidnik; over the next four months, Josephina lives shackled in a basement while her captor abducts four more women to hold hostage in his house of horrors.

Bergen County, N.J., Chief of Detectives Robert Anzilotti elicited murder confessions from a vicious but relatively unknown serial killer, Richard Cottingham, nicknamed the Torso Killer; Anzilotti's mission to tie Cottingham to additional murders.

Bergen County, N.J., Chief of Detectives Robert Anzilotti continues his mission to tie Cottingham to additional murders and to get him to confess to more cold-case homicides.

Bergen County, N.J., Chief of Detectives Robert Anzilotti elicited murder confessions from a vicious but relatively unknown serial killer, Richard Cottingham, nicknamed the Torso Killer; Anzilotti's mission to tie Cottingham to additional murders.

Bergen County, N.J., Chief of Detectives Robert Anzilotti continues his mission to tie Cottingham to additional murders and to get him to confess to more cold-case homicides.

Jennifer Asbenson recounts her fight to stay alive and escape the clutches of 32-year-old Andrew Urdiales, her would-be killer who kidnapped her in September 1992 when she 17.

In August of 1978, 14-year-old Lisa Gilbert and her 13-year-old brother, Randy, were attacked by a stranger in their newly built home in Lansing, Mich.

In April of 2016, 16-year-old Madison Nygard walks home from a party in rural Muskegon County, Mich., and takes a ride with a passing stranger.

Josephina Rivera's life comes to a halt when the 25-year-old is kidnapped by 43-year-old Gary Heidnik; over the next four months, Josephina lives shackled in a basement while her captor abducts four more women to hold hostage in his house of horrors.

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From a prison cell, Felipe founded the New York chapter of the Latin Kings street gang; Felipe's own writings would incriminate him.

Barry Mills found his calling as the leader of the white supremacist prison gang the Aryan Brotherhood.

Garcia was the head of a deadly heroin ring in the Bronx; Henao led an ecstasy drug ring out of the Netherlands; Sandra Avila Beltran was a Mexican drug cartel leader.

Quasand Lewis made millions by way of drug trafficking; the federal government launched "Operation Falling Star" in order to take down 'Q' and build the largest drug related prosecution in the history of the state of Michigan.

James "Whitey" Bulger reigned supreme in the Boston underworld for over 20 years, consolidating his power by ratting out rivals to the FBI.

A ruthless gang called "Murder, Inc." carried out mob hits during the 1930s; Mob leaders formed The Syndicate, and as their enforcement arm, members of Murder, Inc. killed an estimated 1,000 people from coast to coast.

A group of ruthless Irish punks called the "Westies" terrorize Hell's Kitchen in New York City in the the 1970s.

Irish mobster Danny Greene clashed with the Cleveland mafia; a bombing war that would eventually destroy them both.

Carmine Persico stands as one of most enduring Godfathers in mafia history.

Frank Nitti joined Al Capone's criminal empire in 1920, rising quickly in the organization; in 1933, Frank caught his big break when Capone went to prison for tax evasion, and Nitti took over his criminal enterprise.

Tony Spilotro made his name in Chicago's most powerful organized crime family and was given control of the gang's casino interests in Las Vegas.

Gregory Scarpa lived a charmed triple life; mafia hit man, loving father and husband, and secret FBI informant.

While the Boston underworld was in chaos in the 1970s, Whitey Bulger schemed and killed his way through the ranks to become the most famous gangster in Boston history as well as the the subject of the longest manhunt in U.S. history.

In 1980s New York, two opposing factions of the American Mafia split the Gambino crime family down the middle; the old school and the new school struggle against one another; one murderous capo emerges as the Boss of Bosses.

While the Boston underworld was in chaos in the 1970s, Whitey Bulger schemed and killed his way through the ranks to become the most famous gangster in Boston history as well as the the subject of the longest manhunt in U.S. history.

In 1980s New York, two opposing factions of the American Mafia split the Gambino crime family down the middle; the old school and the new school struggle against one another; one murderous capo emerges as the Boss of Bosses.

Tony Spilotro made his name in Chicago's most powerful organized crime family and was given control of the gang's casino interests in Las Vegas.

Gregory Scarpa lived a charmed triple life; mafia hit man, loving father and husband, and secret FBI informant.

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A woman is terrorized in her apartment; a man is attacked by a grizzly bear; a 16 year old girl is abducted at knife point.

A woman survives three shotgun wounds to the head; a family is attacked by bees; a school library shooting rampage.

A single mom is attacked by an old classmate after spurning his affections; a gold prospector survives five days in the Australian Outback; a woman is left for dead after being shot in a carjacking.

Masked gunmen threaten to kill a woman's daughter if she doesn't rob the bank vault where she works; two teens in a sailboat are swept out to sea for six days.

A new breed of participants enter the program and encounter unprecedented challenges in Sheriff Scandrett's jail.

As new participants enter the Henry County jail, they discover that the conditions in the quarantine pods are far harsher than their previous experiences in jail.

Sheriff Scandrett faces a challenge when the conditions of the Quarantine Pods take a serious toll on the participants that risk the success of the program.

The final participant enters the program while the others confront new challenges around drugs, COVID, and intense inmates.

The first participants move to general population and begin to form bonds with new inmates, while others hit their breaking point in quarantine; they learn that the men's quarantine pod is active at night.

Arriving at the limits of his patience and sanity, Chase makes a big decision; Carlos makes a run for access and status in the pod by opening up his own store, and takes Nick, a young inmate, as a protege.

General population proves to be no walk in the park as the participants deal with shake downs, a flooded pod, unwanted attention, and dirty laundry.

A new inmate enters the men's pod; Darius and Carlos work together to protect the pod and keep the peace; Rose attempts to help a rambunctious inmate who has been rubbing her the wrong way.

Rose grapples with devastating news; Trinity encourages the women to find positive ways to express themselves; Darius coaches the men on how to make money legally on the outside; the return of another inmate causes turmoil within the pod.

Carlos learns why he was removed from the program early; Darius struggles to keep peace in the pod; The serenity within the women's pod is shattered; the three remaining participants meet with the sheriff to debrief him on what they've discovered.

The participants reunite to discuss the highs and lows of their reincarceration in the Henry County Jail, and explosive arguments erupt within the group; Soledad O'Brien hosts.

The participants press Sheriff Scandrett and his team on the difficult conditions they endured during their time in the Henry County Jail; Shaquille O'Neal makes a surprise appearance; Soledad O'Brien hosts.

Rose grapples with devastating news; Trinity encourages the women to find positive ways to express themselves; Darius coaches the men on how to make money legally on the outside; the return of another inmate causes turmoil within the pod.

Carlos learns why he was removed from the program early; Darius struggles to keep peace in the pod; The serenity within the women's pod is shattered; the three remaining participants meet with the sheriff to debrief him on what they've discovered.

The participants reunite to discuss the highs and lows of their reincarceration in the Henry County Jail, and explosive arguments erupt within the group; Soledad O'Brien hosts.

The participants press Sheriff Scandrett and his team on the difficult conditions they endured during their time in the Henry County Jail; Shaquille O'Neal makes a surprise appearance; Soledad O'Brien hosts.

General population proves to be no walk in the park as the participants deal with shake downs, a flooded pod, unwanted attention, and dirty laundry.

A new inmate enters the men's pod; Darius and Carlos work together to protect the pod and keep the peace; Rose attempts to help a rambunctious inmate who has been rubbing her the wrong way.

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A young girl is abducted and raped by a serial killer; a man is trapped under the rubble from the Haitian earthquake; a woman is beaten and slashed with scissors by a neighbor.

A man is stranded in the ocean after he gets separated from his dive partner; a woman is robbed by her best friend and brother; a woman is shot and held captive.

A young girl is turned into a sexual slave; A young man is brainwashed ; a young woman breaks out of a religious organization she was born into.

A home invasion leaves a man fighting for his life; a boat capsizes; a woman faces a terrifying death locked in the trunk of her car.

The search for Kalif Logan's killer takes police south through the woods of North Carolina.

Deputy Michelle Mendez tracks a criminal who has been on the run for 15 years.

The U.S. Marshals track a woman who robbed a Richmond, Va., bank at gunpoint.

A violent escapee convicted of manslaughter may be suicidal.

Kalif Logan is shot 13 times with an AK-47; Detectives Peppers and Potucek search for Logan's killer.

A repeat sex offender is on the run from the task force.

A criminal is accused of molesting his niece after a family gathering.

Detective Sgt. Luddie Austin discovers the downside of pursuing fugitives in his hometown.

The Marshals follow a couple, wanted in connection to an attempted murder, to Amish country.

Commander Lenny DePaul launches an intense search for a sex offender wanted for larceny and violating his parole.

An armed robber hides in his hometown of Syracuse, N.Y.

Deputy Roland Ubaldo and his team try to track down a suspect in the killing of a rising hip-hop star.

A quiet neighborhood becomes a war zone when a gun battle breaks out during the night; detectives find a young father of two lying dead in his bedroom.

Police find a body riddled with bullet holes when a van crashes in front of a house; fingerprints and witness testimony lead investigators deep into the victim's inner circle.

Detectives find the body of a 34-year-old man who appears to have been shot to death behind an abandoned building.

Investigators race against time to identify a murder suspect.

A 21-year-old man is gunned down during a shootout in a residential neighborhood.

Two men are found fatally beaten in their bedrooms; detectives learn that the victims had been harassed for being gay.

Detectives find the body of a 34-year-old man who appears to have been shot to death behind an abandoned building.

Investigators race against time to identify a murder suspect.

A 21-year-old man is gunned down during a shootout in a residential neighborhood.

Two men are found fatally beaten in their bedrooms; detectives learn that the victims had been harassed for being gay.

A quiet neighborhood becomes a war zone when a gun battle breaks out during the night; detectives find a young father of two lying dead in his bedroom.

Police find a body riddled with bullet holes when a van crashes in front of a house; fingerprints and witness testimony lead investigators deep into the victim's inner circle.

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A woman is brutally assaulted then set on fire by her attacker; a man is forced to amputate part of his leg after it is caught in a drive shaft; an act of kindness backfires on a motorist.

Abducted and raped; a accident on a boat; a domestic argument leaving two people dead.

Attacked and abducted by a church handyman, an elderly woman is left in the trunk of her car to die; a miner and eight co-workers survive 77 hours trapped in a rapidly flooding coal mine.

A young mother is attacked by a man she meets at a party; a snowmobiler survives a series of avalanches; a 14-year old and his friend are attacked.

When 8-year-old April Tinsley is found dead in a Fort Wayne, Ind., the community is shaken; disturbing letters then appear, penned by her killer, targeting other young girls; police scramble to catch April's murderer before he strikes again.

The bodies of five people abducted from a restaurant in 1983 are found in an oil field; the main suspect is long believed to be a well-connected local man, until evidence reveals the true killers had been hiding in plain sight for decades.

When model Dawn Koons,18, heads to California with dreams of stardom, her family back in Yonkers worry she's made a mistake; within months, her body is found in her bathtub; police have a suspect but unmasking her killer takes nearly 40 years.

When 9-year-old Campfire Girl, Candy Rogers, turns up dead after selling mints door-to-door; spokane detectives launch a dogged campaign to find her killer; one of the longest Cold Case investigations in Washington State history.

Police learn the key witness in the stabbing death of a beloved aunt was an imposter; a return to the crime scene reveals a clue hidden in plain sight.

The body of Lori Nesson is found in a ditch in 1974, but the search for her killer finally begins when the cause of death is changed to homicide 40 years later.

When 13-year-old Jennifer Bastian is abducted and murdered in August 1986, residents of Tacoma, Wash., panic; convinced a predator is on the loose, police embark on a 32-year inquiry to catch the killer.

A special cold-case unit needs a small town's help to solve the 22-year-old murder of a Michigan teenager whose body was found in the woods.

In 1972, the body of Jody Loomis is found in the woods; thirty-four years later, the killer's DNA is recovered from Jody's old clothing but it isn't matched until 2018 when genetic genealogy helps point to one suspect.

In the 1980s, within South Central La., a serial killer preys on and attacks women, discarding their bodies in the street; detectives are assigned to the case, but struggle to pin any suspects as the case starts to go cold.

In 1980s Los Angeles, a killer is terrorizing South Central, murdering African American women and discarding their bodies in the street; as the victim count rises, fear and anger take hold in a community often overlooked by the police.

On Easter Sunday of 1992, the body of missing woman Lisa Ziegert is found in a field; the investigation yields many leads, but no true suspect; after more than two decades on ice, the case is revived when DNA phenotyping puts a face to the killer.

In 1972, the body of Jody Loomis is found in the woods; thirty-four years later, the killer's DNA is recovered from Jody's old clothing but it isn't matched until 2018 when genetic genealogy helps point to one suspect.

In the 1980s, within South Central La., a serial killer preys on and attacks women, discarding their bodies in the street; detectives are assigned to the case, but struggle to pin any suspects as the case starts to go cold.

In 1980s Los Angeles, a killer is terrorizing South Central, murdering African American women and discarding their bodies in the street; as the victim count rises, fear and anger take hold in a community often overlooked by the police.

On Easter Sunday of 1992, the body of missing woman Lisa Ziegert is found in a field; the investigation yields many leads, but no true suspect; after more than two decades on ice, the case is revived when DNA phenotyping puts a face to the killer.

When 13-year-old Jennifer Bastian is abducted and murdered in August 1986, residents of Tacoma, Wash., panic; convinced a predator is on the loose, police embark on a 32-year inquiry to catch the killer.

A special cold-case unit needs a small town's help to solve the 22-year-old murder of a Michigan teenager whose body was found in the woods.

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A woman is raped, shot three times and left for dead; a man is caught in a blizzard that threatens to bury him alive; two boys survive a plane crash.

A pregnant woman is attacked by her neighbor; a young girl is abducted and held captive; a hiker spends three days crawling down a mountain after breaking his ankle.

A woman is abducted at knife-point; a farmer rips his hand off to escape from a combine harvester; a girl is left for dead after having her throat slit.

A mother is abducted by a man who threatens to shoot her baby; a plane crash leaves a man swimming for his life; a woman must play dead to stay alive.

The family of Kenia Monge share the agonizing details of what happened around the beautiful 19-year-old's disappearance; her father, sister and authorities explain how the texts in Kenia's cell phone were the impetus to finding her abductor.

Those closest to Madison Nygard share the agonizing details around the beautiful 16-year-old's terrifying abduction as she walked home from a party; her mother, friends and authorities explain how Madison's attack would ultimately uncover clues.

When Deserae Turner doesn't come home after school, her mother and friends begin texting her incessantly; a massive search ensues and 47 of her friends are questioned; her Snapchat turns out to be the key to the mystery.

Travel blogger Carla Stefaniak goes to Costa Rica to celebrate her 36th birthday, but when she is to arrive back home in Miami, her awaiting loved ones realize she never got on the plane; Carla's friends and family recount the search to find her.

When mother-of-two Deanna Cook misses her daily call to her mom, her family worries that Deanna's stalker may have something to do with it; her family's 911 call falls on deaf ears and they are forced to make a discovery.

Rising social media influencer Alexis Murphy is on her way to a hair appointment, but never arrivea; her worried loved-ones know something was wrong; there's a crack in the case when gas station surveillance video reveals something truly bizarre.

Another girl and a secret come between two unlikely best friends, leading to a gruesome murder.

A hidden attraction turns to jealousy setting off a chain reaction of anger and revenge between two friends.

Lula and Linda are best friends and perfect neighbors but one of them will do anything to make her dreams come true.

After finding each other online, two young girls form a friendship that becomes something deeper.

At a university for the Deaf, the pressures of college become too much for two friends.

The stories of seven suspects featured in the first season of "I Killed My BFF."

Lula and Linda are best friends and perfect neighbors but one of them will do anything to make her dreams come true.

After finding each other online, two young girls form a friendship that becomes something deeper.

At a university for the Deaf, the pressures of college become too much for two friends.

The stories of seven suspects featured in the first season of "I Killed My BFF."

Another girl and a secret come between two unlikely best friends, leading to a gruesome murder.

A hidden attraction turns to jealousy setting off a chain reaction of anger and revenge between two friends.

Learn what's behind mental decline with age, and how to improve memory, focus and concentration with NeuroQ's Darrin Peterson and Dale Bredesen MD.

DraftKings Sportsbook, a top-rated sportsbook app!

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A man, high on the drug PCP, goes on a rampage, stabbing his 11-year-old daughter and viciously attacking and stabbing a neighbor and her son; a man is beaten unconscious by his building contractor.

A pregnant woman is abducted, raped and left to die; a man faces freezing to death after a plane crash; a man must play dead to fight for his life.

Jayne fights to save Eduardo after he is kidnapped, tortured, confined to a box and shot twice.

Danielle is shot point blank in the head by a 14 year old boy; Amy falls 60 feet into a rocky ravine; Mark is attacked with a knife on his boat.

A New Orleans man is found in the street bleeding from multiple gunshot wounds; police investigate the shooting while emergency medical technicians try to save the victim's life.

An EMS officer shares emotional news with his partner; firefighters respond to a call about a vehicle ablaze at a gas station.

Emergency medical technicians Titus and Dan also act as therapists and counselors as they help steer troubled people back in the right direction.

Tempers rise and violence swells during a hot, humid evening; police chase two armed carjacking suspects; Keeley tends to a family injured in a car accident; Titus and Dan respond to a call from a former Playboy Bunny.

New Orleans EMT responders face the darkness of death and the joy of life in one whirlwind episode, from treating gunshot victims and car-accident patients to delivering a baby - with one of the technicians expecting a baby of her own.

Suspected drug dealers are hunted by the police; a violent schizophrenic threatens a group of partygoers.

The first responders work to save the victims of several shootings and a drug overdose; police officers apprehend suspects in possession of illegal firearms.